142 lines
3.8 KiB
Diff
142 lines
3.8 KiB
Diff
From 98f8f090ba1a93ce28bc62362365e5e14fedd3e8 Mon Sep 17 00:00:00 2001
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From: Dongjin Kim <tobetter@gmail.com>
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Date: Wed, 30 Jun 2021 11:38:33 +0900
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Subject: [PATCH 44/75] ODROID-COMMON: hwmon: (pwm-fan): fix to add
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'pwm1_enable' to set PWM fan mode
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Change-Id: If0562f497703b8660206dad80d7933902bbf53e4
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---
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drivers/hwmon/pwm-fan.c | 67 +++++++++++++++++++++++++++++++++++++----
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1 file changed, 61 insertions(+), 6 deletions(-)
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diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
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index 17518b4cab1b..b539cd2bbef6 100644
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--- a/drivers/hwmon/pwm-fan.c
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+++ b/drivers/hwmon/pwm-fan.c
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@@ -8,6 +8,7 @@
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*/
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#include <linux/hwmon.h>
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+#include <linux/hwmon-sysfs.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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@@ -44,6 +45,7 @@ struct pwm_fan_ctx {
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unsigned int pwm_fan_max_state;
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unsigned int *pwm_fan_cooling_levels;
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struct thermal_cooling_device *cdev;
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+ int enable;
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struct hwmon_chip_info info;
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struct hwmon_channel_info fan_channel;
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@@ -99,6 +101,10 @@ static int __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm)
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struct pwm_state *state = &ctx->pwm_state;
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mutex_lock(&ctx->lock);
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+
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+ if (!ctx->enable)
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+ pwm = MAX_PWM;
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+
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if (ctx->pwm_value == pwm)
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goto exit_set_pwm_err;
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@@ -183,6 +189,51 @@ static const struct hwmon_ops pwm_fan_hwmon_ops = {
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.write = pwm_fan_write,
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};
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+static ssize_t enable_store(struct device *dev,
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+ struct device_attribute *attr,
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+ const char *buf, size_t count)
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+{
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+ struct pwm_fan_ctx *ctx = dev_get_drvdata(dev);
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+ int err;
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+ unsigned long val;
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+
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+ err = kstrtoul(buf, 10, &val);
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+ if (err)
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+ return err;
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+
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+ mutex_lock(&ctx->lock);
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+ ctx->enable = val;
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+ mutex_unlock(&ctx->lock);
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+
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+ err = __set_pwm(ctx, ctx->pwm_fan_cooling_levels[ctx->pwm_fan_state]);
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+
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+ return err ? err : count;
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+}
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+
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+static ssize_t enable_show(struct device *dev, struct device_attribute *attr,
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+ char *buf)
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+{
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+ struct pwm_fan_ctx *ctx = dev_get_drvdata(dev);
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+
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+ return sprintf(buf, "%u\n", ctx->enable);
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+}
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+
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+static SENSOR_DEVICE_ATTR_RW(pwm1_enable, enable, 0);
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+
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+static struct attribute *pwm_fan_attrs[] = {
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+ &sensor_dev_attr_pwm1_enable.dev_attr.attr,
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+ NULL,
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+};
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+
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+static const struct attribute_group pwm_fan_group = {
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+ .attrs = pwm_fan_attrs,
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+};
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+
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+static const struct attribute_group *pwm_fan_groups[] = {
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+ &pwm_fan_group,
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+ NULL,
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+};
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+
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/* thermal cooling device callbacks */
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static int pwm_fan_get_max_state(struct thermal_cooling_device *cdev,
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unsigned long *state)
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@@ -214,7 +265,7 @@ static int
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pwm_fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
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{
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struct pwm_fan_ctx *ctx = cdev->devdata;
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- int ret;
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+ int ret = 0;
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if (!ctx || (state > ctx->pwm_fan_max_state))
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return -EINVAL;
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@@ -222,10 +273,12 @@ pwm_fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
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if (state == ctx->pwm_fan_state)
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return 0;
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- ret = __set_pwm(ctx, ctx->pwm_fan_cooling_levels[state]);
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- if (ret) {
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- dev_err(&cdev->device, "Cannot set pwm!\n");
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- return ret;
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+ if (ctx->enable >= 2) {
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+ ret = __set_pwm(ctx, ctx->pwm_fan_cooling_levels[state]);
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+ if (ret) {
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+ dev_err(&cdev->device, "Cannot set pwm!\n");
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+ return ret;
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+ }
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}
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ctx->pwm_fan_state = state;
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@@ -316,6 +369,8 @@ static int pwm_fan_probe(struct platform_device *pdev)
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if (IS_ERR(ctx->pwm))
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return dev_err_probe(dev, PTR_ERR(ctx->pwm), "Could not get PWM\n");
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+ ctx->enable = 2;
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+
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platform_set_drvdata(pdev, ctx);
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ctx->reg_en = devm_regulator_get_optional(dev, "fan");
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@@ -436,7 +491,7 @@ static int pwm_fan_probe(struct platform_device *pdev)
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ctx->info.info = channels;
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hwmon = devm_hwmon_device_register_with_info(dev, "pwmfan",
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- ctx, &ctx->info, NULL);
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+ ctx, &ctx->info, pwm_fan_groups);
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if (IS_ERR(hwmon)) {
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dev_err(dev, "Failed to register hwmon device\n");
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return PTR_ERR(hwmon);
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--
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2.25.1
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